桩轴向荷载－沉降曲线的一种解析算法

Analytical Calculation of Axial Loadig-Settlement Curve of Piles

选用常用双折线荷载传递函数，本文导出了一组确定桩的轴向荷载－沉降曲线的解析算式，并由此分析了桩周和桩底土的影响以及桩承载力与其加载初始刚度间的关系。文中对几根桩的实测荷载。沉降曲线进行了理论拟合，表明本文公式在工程中是可用的。本文部分结论对弄清由刚度推求桩承载力的各种小应变动测技术（如动参数法、机械阻抗法等）的适用范围将具有实用价值。

With bilinear load-transferfunction,a set of analytical equations for the axial loading-settle-ment curve of pile are established. Influences of the surrounding and underlying soils on the loading--settlement curves and the correlation of elastic stifftness with bearing capacity of pile are then discus-sed herein. This paper will be of practical significance in design of pile foundations and evaluation of thetheoretical basis and limitation for low-strain dynamic tests of pile.